Riveting-machine



(No Model.)

H. 0. ROBERTS.

RIVETING MACHINE.

Patented Jan. 3, 1888.

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. N PETERS Phm-Limv m m. Washington. D. c,

5o pulley-shaft 6.

UNITED STATES PATENT OFFICE.

HUMPHREY O. ROBERTS, OF MINNEAPOLIS, MINNESOTA.

RIVETING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 375,772, dated January 3, 1898.

Applicniion filed March 25, 1887.

To aZZ whom it may concern;-

Beit known that I, HUMPHREY O. RoBER'rs, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Riveting-Machines, of which the following is a specification.

My invention relates to machines for swaging the ends of rivets to form retaining-heads.

It is the object of the invention to provide mechanism for operating a hammenshaft by means ofa spring-lever to form the rivet-heads by a succession of light blows, after the manner of hand-blows; and the invention consists, generally, in a spring-bar operated by a pitman to reciprocate a vertically guided rod carrying a rivetingtool, and a vertically-adjustable anvil for presenting the rivet to the reciprocating tool.

The improvements are illustrated in the accompanying drawings, in which- Figure 1 shows a side elevation of the ma chine; Fig. 2, a vertical section of the post and table and adjustable anvil. Figs. 3 and 4 are details of anvils for holding staples. Figs. 5 and 6 are enlarged views of a portion of the hammer-shaft and riveting-tool. Fig. 7 is a sectional view of the spring-lever on the line 3 y of Fig. 1, showing the hammer-shaft fastening; and Fig. 8 is asection of the springlever on the line zz of Fig. 1, showing the pitman-connection.

The letter A designates a post, to which the end of a spring-bar, B, is pivoted by means of a pin, 11, in a bracket, bf, attached to the post. The bar B is preferably made of tough elastic woodsuch as hiekory-but may be of suitable metal, and should taper from its pivotal point to the point of connecting the hammer shaft. Near its middle the bar is connected to a pitman, c, by a loop, a, or any suitable device, and should be somewhat loose in the loop to permit sufficient sliding to compensate for the varying angularity of the parts in action. To prevent rattling and unnecessary wear, strips ofrubber, d, may be fastened in the loop or on the bar. The pitman is connected to a wrist, c", on a wheel, 0, carried by the The shaft is mounted in hang- Serial No. 232,372. (No model.)

ers e and has a fast and a loose pulley, e e, respectively. At the outer end of the springlever is connected the vertical hamrner'shaft f, by means of a loop, g, or other suitable device, in which the bar will be allowed the proper longitudinal movement when in operation. The hammer-shaft slides in guides h, which may be attached to a post or wall. I11 the lower end of the shaftf is a slot or socket, f, for receiving the shank i of a riveting-tool, i, which is held in the socket by a thumbscrew, 8.

Below the riveting tool is a table, a, having a central opening, a, and supported on apost, a In the opening a is an anvil, k, held on the end of a sliding bar, Z, by socketing its shank 7c in the bar. The bar is fitted in a groove in the side of the post a, or at the outside in guides at, so that it may freely slide up and down. A pin, 1), projecting from the bar, is engaged by a lever, 71, which is fulcrumed at o and has attached to its outer end a cord, q, extending to a treadle, t, in convenient position for an operator.

It will be apparent that by operating the treadle t the anvil It can be raised or lowered as required by the varying thicknesses of material placed upon the anvil to be riveted. It will also be obvious that if rapid motion is imparted to the spring-lever by the pitman the hammer-shaft will give the rivetingtool a like quick movement, and the operator may adjust the anvil and shift the position of the pieces to be riveted so as to regulate the forming of the rivet-head to the shape he may desire.

In case staples are to be clinched, an anvil, 2), having a rounded socket, o, as shown in Figs. 3 and 4, may be used.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In a rivetingmachine, the combination, with a reciprocating riveting-tool, of an anvil, a supporting-bar therefor, guides for said bar, and a lever and foottreadle for raising and lowering the same to adjust the anvil to the riveting-tool, substantially as set forth.

2. In a riveting-machine, a pivoted springbar, a pitman connected therewith, a hammer shaft also connected therewith and carrying a lever n and treadle t, substantially as and for riveting-tool, an anvil and its adjustable supthe purpose set forth. portand a lever for ad'ustin said anvil-s11 port: substantially as set fort h. p HUMPHREY ROBERTS 5 3. In combination, the pivoted spring-bar Witnesses:

B, pitman c, hammer-shaft f, riveting-tool i, M. F. HANLEY, anvil is, its support 1, having pin and the P. H. GUNOKEL. 

